<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Login</title>
</head>
<body>

<form action="{% url 'app:do_login' %}" method="post">
    <span>用户名:</span> 
    <input type="text" placeholder="请输入用户名" name="uname">
    <br>
    <button>登录</button>
</form>
</body>
</html>